Have a Dell 2200 MP w/609 hours on lamp. Several weeks ago a darkening band appeared on left edge of screen from top to bottom. Not a sharp edge but graduated affecting about 1/8 of the display. In about 3 months time this band grew to cover about 1/5 of the screen. Today I removed the lamp to inspect it and the projector. All appeared OK. Immediately after re-installing the lamp the area affected grew to cover almost half of the display. Replaced lamp with a back-up and after re-installing I've lost 3/4 of the image and after going back to the original lamp the entire image is impossibly dim. Image is sharp and color seems correct but too dark. Tried a reset to factory spec's to no avail. Any idea's? This Noob thanks you in advance!

daiva

12-20-2009 10:55 PM

Re: Dimming Dell

Tis is most likely caused by the projector LCD back light or LCD screen inside projector failing.

vtwintom

12-20-2009 11:08 PM

Re: Dimming Dell

Quote:

Originally Posted by daiva
(Post 23464)

Tis is most likely caused by the projector LCD back light or LCD screen inside projector failing.

Thanks daiva but the Dell 2200MP is a DLP not a LCD and what would explain the condition worsening every time the lamp is repaced?

rbinck

12-21-2009 09:28 AM

Re: Dimming Dell

Quote:

Originally Posted by vtwintom
(Post 23465)

Thanks daiva but the Dell 2200MP is a DLP not a LCD and what would explain the condition worsening every time the lamp is repaced?

My guess is there is a diffuser or lense between the lamp and DLP chip that is deteriorating due to heat. Maybe new bulbs make the condition show up more.

Have a Dell 2200 MP w/609 hours on lamp. Several weeks ago a darkening band appeared on left edge of screen from top to bottom. Not a sharp edge but graduated affecting about 1/8 of the display. In about 3 months time this band grew to cover about 1/5 of the screen. Today I removed the lamp to inspect it and the projector. All appeared OK. Immediately after re-installing the lamp the area affected grew to cover almost half of the display. Replaced lamp with a back-up and after re-installing I've lost 3/4 of the image and after going back to the original lamp the entire image is impossibly dim. Image is sharp and color seems correct but too dark. Tried a reset to factory spec's to no avail. Any idea's? This Noob thanks you in advance!